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https://poki.com/en/g/energy

https://wordwall.net/en-us/community/forms-of-energy-game

https://wordwall.net/resource/8601647/forms-of-energy-melts

https://wordwall.net/resource/58427808/science/forms-of-energy-sort-grade-3-science

https://climatekids.nasa.gov/menu/energy/

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Have you noticed solar panels on top of a building? They use the sun’s energy. They turn it into electricity that people can use. Take a look! 1. Sunlight hits the solar panels. 2. The panels have tiny…

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Renewable energy Archives - Science Journal for Kids and Teens

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Cutting Edge Peer Reviewed Science Research

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The wind, the sun, and Earth are sources of renewable energy. These energy sources naturally renew, or replenish themselves.

Wind, sunlight, and the planet have energy that transforms in ways we can see and feel. We can see and feel evidence of the transfer of energy from the sun to Earth in the sunlight shining on the ground and the warmth we feel when sunlight shines on our skin. We can see and feel evidence of the transfer of energy in wind's ability to pull kites higher into the sky and shake the leaves on trees. We can see and feel evidence of the transfer of energy in the geothermal energy of steam vents and geysers.

People have created different ways to capture the energy from these renewable sources.

Solar energy can be captured "actively" or "passively."

Active solar energy uses special technology to capture the sun's rays. The two main types of equipment are photovoltaic cells (also called PV cells or solar cells) and mirrors that focus sunlight in a specific spot. These active solar technologies use sunlight to generate electricity, which we use to power lights, heating systems, computers, and televisions.

Passive solar energy does not use any equipment. Instead, it gets energy from the way sunlight naturally changes throughout the day. For example, people can build houses so their windows face the path of the sun. This means the house will get more heat from the sun. It will take less energy from other sources to heat the house.

Other examples of passive solar technology are green roofs, cool roofs, and radiant barriers. Green roofs are completely covered with plants. Plants can get rid of pollutants in rainwater and air. They help make the local environment cleaner.

Cool roofs are painted white to better reflect sunlight. Radiant barriers are made of a reflective covering, such as aluminum. They both reflect the sun's heat instead of absorbing it. All these types of roofs help lower the amount of energy needed to cool the building.

Advantages and Disadvantages
There are many advantages to using solar energy. PV cells last for a long time, about 20 years.

However, there are reasons why solar power cannot be used as the only power source in a community. It can be expensive to install PV cells or build a building using passive solar technology.

Sunshine can also be hard to predict. It can be blocked by clouds, and the sun doesn't shine at night. Different parts of Earth receive different amounts of sunlight based on location, the time of year, and the time of day.

Wind Energy

People have been harnessing the wind's energy for a long, long time. Five-thousand years ago, ancient Egyptians made boats powered by the wind. In 200 B.C.E., people used windmills to grind grain in the Middle East and pump water in China.

Today, we capture the wind's energy with wind turbines. A turbine is similar to a windmill; it has a very tall tower with two or three propeller-like blades at the top. These blades are turned by the wind. The blades turn a generator (located inside the tower), which creates electricity.

Groups of wind turbines are known as wind farms. Wind farms can be found near farmland, in narrow mountain passes, and even in the ocean, where there are steadier and stronger winds. Wind turbines anchored in the ocean are called "offshore wind farms."

Wind farms create electricity for nearby homes, schools, and other buildings.

Advantages and Disadvantages
Wind energy can be very efficient. In places like the Midwest in the United States and along coasts, steady winds can provide cheap, reliable electricity.

Another great advantage of wind power is that it is a "clean" form of energy. Wind turbines do not burn fuel or emit any pollutants into the air.

Wind is not always a steady source of energy, however. Wind speed changes constantly, depending on the time of day, weather, and geographic location. Currently, it cannot be used to provide electricity for all our power needs.

Wind turbines can also be dangerous for bats and birds. These animals cannot always judge how fast the blades are moving and crash into them.

Geothermal Energy

Deep beneath the surface is Earth's core. The center of Earth is extremely hot-thought to be over 6,000 °C (about 10,800 °F). The heat is constantly moving toward the surface.

We can see some of Earth's heat when it bubbles to the surface. Geothermal energy can melt underground rocks into magma and cause the magma to bubble to the surface as lava. Geothermal energy can also heat underground sources of water and force it to spew out from the surface. This stream of water is called a geyser.

However, most of Earth's heat stays underground and makes its way out very, very slowly.

We can access underground geothermal heat in different ways. One way of using geothermal energy is with "geothermal heat pumps." A pipe of water loops between a building and holes dug deep underground. The water is warmed by the geothermal energy underground and brings the warmth aboveground to the building. Geothermal heat pumps can be used to heat houses, sidewalks, and even parking lots.

Another way to use geothermal energy is with steam. In some areas of the world, there is underground steam that naturally rises to the surface. The steam can be piped straight to a power plant. However, in other parts of the world, the ground is dry. Water must be injected underground to create steam. When the steam comes to the surface, it is used to turn a generator and create electricity.

In Iceland, there are large reservoirs of underground water. Almost 90 percent of people in Iceland use geothermal as an energy source to heat their homes and businesses.

Advantages and Disadvantages
An advantage of geothermal energy is that it is clean. It does not require any fuel or emit any harmful pollutants into the air.

Geothermal energy is only avaiable in certain parts of the world. Another disadvantage of using geothermal energy is that in areas of the world where there is only dry heat underground, large quantities of freshwater are used to make steam. There may not be a lot of freshwater. People need water for drinking, cooking, and bathing.

Biomass is any material that comes from plants or microorganisms that were recently living. Plants create energy from the sun through photosynthesis. This energy is stored in the plants even after they die.

Trees, branches, scraps of bark, and recycled paper are common sources of biomass energy. Manure, garbage, and crops, such as corn, soy, and sugar cane, can also be used as biomass feedstocks.

We get energy from biomass by burning it. Wood chips, manure, and garbage are dried out and compressed into squares called "briquettes." These briquettes are so dry that they do not absorb water. They can be stored and burned to create heat or generate electricity.

Biomass can also be converted into biofuel. Biofuels are mixed with regular gasoline and can be used to power cars and trucks. Biofuels release less harmful pollutants than pure gasoline.

Advantages and Disadvantages
A major advantage of biomass is that it can be stored and then used when it is needed.

Growing crops for biofuels, however, requires large amounts of land and pesticides. Land could be used for food instead of biofuels. Some pesticides could pollute the air and water.

Biomass energy can also be a nonrenewable energy source. Biomass energy relies on biomass feedstocks-plants that are processed and burned to create electricity. Biomass feedstocks can include crops, such as corn or soy, as well as wood. If people do not replant biomass feedstocks as fast as they use them, biomass energy becomes a non-renewable energy source.

Hydroelectric energy is made by flowing water. Most hydroelectric power plants are located on large dams, which control the flow of a river.

Dams block the river and create an artificial lake, or reservoir. A controlled amount of water is forced through tunnels in the dam. As water flows through the tunnels, it turns huge turbines and generates electricity.

Advantages and Disadvantages
Hydroelectric energy is fairly inexpensive to harness. Dams do not need to be complex, and the resources to build them are not difficult to obtain. Rivers flow all over the world, so the energy source is available to millions of people.

Hydroelectric energy is also fairly reliable. Engineers control the flow of water through the dam, so the flow does not depend on the weather (the way solar and wind energies do).

However, hydroelectric power plants are damaging to the environment. When a river is dammed, it creates a large lake behind the dam. This lake (sometimes called a reservoir) drowns the original river habitat deep underwater. Sometimes, people build dams that can drown entire towns underwater. The people who live in the town or village must move to a new area.

Hydroelectric power plants don't work for a very long time: Some can only supply power for 20 or 30 years. Silt, or dirt from a riverbed, builds up behind the dam and slows the flow of water.

Other Renewable Energy Sources

Scientists and engineers are constantly working to harness other renewable energy sources. Three of the most promising are tidal energy, wave energy, and algal (or algae) fuel.

Tidal energy harnesses the power of ocean tides to generate electricity. Some tidal energy projects use the moving tides to turn the blades of a turbine. Other projects use small dams to continually fill reservoirs at high tide and slowly release the water (and turn turbines) at low tide.

Wave energy harnesses waves from the ocean, lakes, or rivers. Some wave energy projects use the same equipment that tidal energy projects do-dams and standing turbines. Other wave energy projects float directly on waves. The water's constant movement over and through these floating pieces of equipment turns turbines and creates electricity.

Algal fuel is a type of biomass energy that uses the unique chemicals in seaweed to create a clean and renewable biofuel. Algal fuel does not need the acres of cropland that other biofuel feedstocks do.

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Renewable energy comes from sources that will not be used up in our lifetimes, such as the sun and wind.

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Renewables are made from natural resources on our planet, like wind, water, and sunlight. They are incredibly valuable energy sources, also known as "clean energy" as they do not pollute the environment. -
Renewables come from our planet's unlimited sources of energy, like wind, sunlight, waves, and the earth's internal heat. Here are 5 main sources of renewable energy and why they are so important to us.

5 Main Sources of Renewable Energy
Solar Energy
This is energy produced directly from sunlight through smart solar panels placed outside of buildings facing the sun. Solar can be used to heat up buildings, water, and be turned into electricity.
Wind Energy
The blades of large windmills are moved by the power of the wind. These blades spin a turbine inside a generator to produce electricity. There are over 341,000 wind turbines on the planet spread across 83 countries.
Hydroelectric Power
Water from dams and rivers can be used to spin powerful turbines and generate what we call hydroelectricity. Several provinces in Canada produce over 90% of their energy through hydropower and the country is one of the largest global consumers of this energy source along with China and Brazil.
Geothermal Energy
Huge pumps extract the heat and steam from below the Earth - mainly from volcanoes and geysers - and use these to heat up homes and buildings as well as to generate electricity. About 25% of the total electricity of Iceland is produced by geothermal energy, thanks to the country's several hot springs.
Biomass Energy
This is the oldest source of renewable energy on the planet. With biomass, we refer to all organic matter that has stored energy through the process of photosynthesis. Think wood, crops, seaweed, and animal wastes. This energy is converted to electricity and heat. In the United States, the majority of biomass energy comes from wood.

Fun Facts About Renewable Energy

In 2020, around 29% of the global energy came from renewable technologies.

Some countries like Albania, Paraguay, and Iceland obtain all of their energy from renewable sources. Norway relies nearly 97% of its electricity from hydropower.

Some renewable energy sources can have environmental impacts, but they are a less polluting and more environmentally friendly alternative to fossil fuels like coal and natural gas.

Solar is the most abundant energy source on Earth.

An hour and a half of sunlight that reaches the planet's surface can generate enough power to meet all of humanity's energy consumption for an entire year .

One wind turbine can produce enough electricity to light up almost 600 homes .

Wind turbines are very complicated machines that can have as many as 8,000 different components.

Why Is Renewable Energy so Important?

Renewables are an essential source of energy for the future and one of the world's most important allies in the race to stop global warming and reach net-zero emissions. They are much cleaner sources and have a very minimal environmental footprint than fossil fuels like coal and natural gas. Another good thing about renewables is that they are endless: while resources of coal and gas are finite, the wind will never stop blowing and the sun will never stop shining! This is amazing news, as we can rely on these energy sources for a very long time.
Check This Out Next: What is Nuclear Energy?

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What is Renewable Energy? - Earth.Org Kids

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Renewable energy is an incredibly valuable energy source. Also known as "clean energy", they do not pollute the environment.

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A town in Finland has begun using the world’s largest “sand battery” to help provide heat. The unusual method of storing energy allows the town to create heat when electricity prices are cheap, and store it for long periods of time. The heat can then be used whenever it’s needed.

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Forms of energy - Energy Kids: U.S. Energy Information Administration (EIA)

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Energy is essential for every one of us. Humans have advanced because we have learned how to change energy from one form into another.

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Energy exists in many different forms. Animals get energy from eating food. Electrical energy is associated with the tiny units called atoms that make up everything in the universe. Particles called electrons may move from one atom to another. In doing so, they store or release energy. Heat and light are also forms of energy. One form of energy can also be transformed into another. Through a battery stored chemical energy changes into electric energy. In a lightbulb, electric energy changes to light and heat.

Potential and Kinetic Energy

Each of the different forms of energy can be described as either potential energy or kinetic energy. Potential energy is stored energy. For example, the chemical energy of food is stored energy. When people eat, their bodies change the stored energy into moving energy such as heat energy or mechanical energy. Potential energy can also come from the position of an object. An object with potential energy because of its position has the ability, or potential, to move. For example, potential energy is stored in a rock perched on a cliff and in an arrow stretched back on a bowstring. If the cliff crumbles under the rock, the rock falls. If the string is let go, it moves forward and pushes the arrow through the air.

As the rock and the arrow move, they gain kinetic energy. Kinetic energy is moving energy. All moving objects have kinetic energy-even atoms. The total random moving energy of all of the atoms and molecules in an object is called heat energy (or thermal energy). The moving energy of a rock rolling down a hill is called mechanical energy.

Mechanical Energy

Mechanical energy is potential energy plus kinetic energy. Unlike the other forms of energy, mechanical energy can exist as both potential energy and kinetic energy. It is all the energy that an object has because of its motion (kinetic energy) and its position (potential energy). Machines use mechanical energy to do work. For instance, a hammer uses mechanical energy to drive a nail into a board. When the hammer is raised, it has potential energy from the work done in lifting it. When the hammer is moved toward the nail, the potential energy becomes kinetic energy, which can do the work of driving the nail into the board. When the hammer hits the nail, energy is transferred to the nail and then to the board.

Heat Energy (Thermal Energy)

All substances are made up of particles, or bits, called molecules. Molecules are always moving around randomly within a substance. Heat energy is the total moving energy (or kinetic energy) of all of the molecules in a substance. All substances have heat energy, since the molecules that make up all substances are always moving.

Mechanical energy and heat energy involve different types of movement. Moving mechanical energy involves all of the molecules of an object moving together such as a rock rolling down a hill. On the other hand, heat energy involves the disordered movement of molecules inside an object.

Light Energy

Light energy is sometimes called radiant energy. It is the only kind of radiant energy that is visible to the naked eye. Radiant energy is the energy that is carried by electromagnetic radiation. Some other examples of radiant energy are radio waves, microwaves, X-rays, and gamma rays. Electromagnetic radiation travels in waves. In addition to light energy, the Sun gives off the entire spectrum of radiant energy carried by electromagnetic radiation.

Light energy is moving energy. It moves in the form of waves and can travel through empty space and air. Different wavelengths of visible light are seen as different colors.

Sound Energy

Sound energy is moving energy. It is produced by the back-and-forth motion of a vibrating object. This motion produces sound waves that travel away from the object. The sound waves can travel only through a substance, such as air, water, or solid objects. Sound travels more slowly than light does.

Electrical Energy

Electrical energy is moving energy. It is the movement of tiny particles called electrons and protons. Electrical energy can be seen in nature in a bolt of lightning, which is a large number of electrons flowing through air all at once. People have learned how to produce electrical energy and control it. Electrical energy is sent through wires or the air to power such things as lightbulbs, ovens, and washing machines.

Chemical Energy

Chemical energy is stored energy (potential energy). It is stored in the bonds between atoms and molecules. Chemical energy is what holds the atoms in a molecule together. It also is what holds molecules in a substance together.

The chemical energy in food is converted, or changed, by the body into moving mechanical energy and heat energy. The chemical energy inside a battery can be converted into electrical energy to turn on a flashlight.

Nuclear Energy

Nuclear energy is stored energy. It is the energy that holds together the nucleus of an atom. Nuclear energy is also called atomic energy. The nucleus is the central part of an atom. Nuclear energy can be released by splitting an atom. It can also be released by joining two nuclei together to form a single nucleus.

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Energy is the ability to do work. Energy makes things move. It makes machines go. Energy also makes living things grow. Types and Forms of Energy Energy exists in many...

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Energy and Different Forms of Energy with Examples - Free Educational videos for Students in K-12 | Lumos Learning

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Energy and Different Forms of Energy with Examples -

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Explore forms of energy in your science classes with experiments, activities and more resources for teachers! From lesson plans on electricity to…

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Energy | The Dr. Binocs Show | Educational Videos For Kids

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Types of Energy  | Energy Forms | Energy Sources and Uses

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Exploring Sound Energy - How We Hear and Sense Sound

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Fun Kids - the UK's children's radio station

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Marina Ventura Energy Explorer [redirect] - Fun Kids - the UK's children's radio station

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The UK's children's radio station for kids, families and parents. Listen on DAB Digital Radio nationwide, online and mobile.

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Fun Kids - the UK's children's radio station

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Undercover Engineers: Future Fuel - Fun Kids - the UK’s children’s radio station

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https://youtu.be/ViXtT8c4z-c

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Energy is essential for every one of us. Humans have advanced because we have learned how to change energy from one form into another.

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Renewable and Non-Renewable Sources of Energy

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Renewable and Non-Renewable Sources of Energy

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How does hydroelectric energy work - BBC Bitesize

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How do hydroelectric dams generate renewable energy using moving water? BBC Bitesize Scotland article for upper primary 2nd Level Curriculum for Excellence.

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https://scied.ucar.edu/learning-zone/earth-system/energy-from-sun

https://scied.ucar.edu/learning-zone/earth-system/types-of-energy

https://ebooks.inflibnet.ac.in/esp07/chapter/sun-as-an-energy-source/

https://www.sciencing.com/sun-release-energy-4567509/

https://www.britannica.com/science/solar-energy

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The interior structure of the Sun. Credit: Wikipedia Commons/kelvinsong

There is a reason life that Earth is the only place in the solar system where life is known to be able to live and thrive. Granted, scientists believe that there may be microbial or even aquatic life forms living beneath the icy surfaces of Europa and Enceladus, or in the methane lakes on Titan. But for the time being, Earth remains the only place that we know of that has all the right conditions for life to exist.

One of the reasons for this is because the Earth lies within our sun's Habitable Zone (aka. "Goldilocks Zone"). This means that it is in right spot (neither too close nor too far) to receive the sun's abundant energy, which includes the light and heat that is essential for chemical reactions. But how exactly does our sun go about producing this energy? What steps are involved, and how does it get to us here on planet Earth?

The simple answer is that the sun, like all stars, is able to create energy because it is essentially a massive fusion reaction. Scientists believe that this began when a huge cloud of gas and particles (i.e. a nebula) collapsed under the force of its own gravity - which is known as Nebula Theory. This not only created the big ball of light at the center of our solar system, it also triggered a process whereby hydrogen, collected in the center, began fusing to create solar energy.

Technically known as nuclear fusion, this process releases an incredible amount of energy in the form of light and heat. But getting that energy from the center of our sun all the way out to planet Earth and beyond involves a couple of crucial steps. In the end, it all comes down to the sun's layers, and the role each of them plays in making sure that solar energy gets to where it can help create and sustain life.
The Core:
The core of the sun is the region that extends from the center to about 20-25% of the solar radius. It is here, in the core, where energy is produced by hydrogen atoms (H) being converted into nuclei of helium (He). This is possible thanks to the extreme pressure and temperature that exists within the core, which are estimated to be the equivalent of 250 billion atmospheres (25.33 trillion KPa) and 15.7 million kelvin, respectively.

The net result is the fusion of four protons (hydrogen nuclei) into one alpha particle - two protons and two neutrons bound together into a particle that is identical to a helium nucleus. Two positrons are released from this process, as well as two neutrinos (which changes two of the protons into neutrons), and energy.

The core is the only part of the sun that produces an appreciable amount of heat through fusion. In fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius. By 30% of the radius, fusion has stopped almost entirely. The rest of the sun is heated by the energy that is transferred from the core through the successive layers, eventually reaching the solar photosphere and escaping into space as sunlight or the kinetic energy of particles.

The sun releases energy at a mass-energy conversion rate of 4.26 million metric tons per second, which produces the equivalent of 384.6 septillion watts (3.846×10 ²⁶ W). To put that in perspective, this is the equivalent of about 9.192×10 ¹⁰ megatons of TNT per second, or 1,820,000,000 Tsar Bombas - the most powerful thermonuclear bomb ever built!
Radiative Zone:
This is the zone immediately next to the core, which extends out to about 0.7 solar radii. There is no thermal convection in this layer, but solar material in this layer is hot and dense enough that thermal radiation is all that is needed to transfer the intense heat generated in the core outward. Basically, this involves ions of hydrogen and helium emitting photons that travel a short distance before being reabsorbed by other ions.

Temperatures drop in this layer, going from approximately 7 million kelvin closer to the core to 2 million at the boundary with the convective zone. Density also drops in this layer a hundredfold from 0.25 solar radii to the top of the radiative zone, going from 20 g/cm ³ closest to the core to just 0.2 g/cm ³ at the upper boundary.
Convective Zone:
This is the sun's outer layer, which accounts for everything beyond 70% of the inner solar radius (or from the surface to approx. 200,000 km below). Here, the temperature is lower than in the radiative zone and heavier atoms are not fully ionized. As a result, radiative heat transport is less effective, and the density of the plasma is low enough to allow convective currents to develop.

Because of this, rising thermal cells carry the majority of the heat outward to the sun's photosphere. Once these cells rise to just below the photospheric surface, their material cools, causing their density increases. This forces them to sink to the base of the convection zone again - where they pick up more heat and the convective cycle continues.

At the surface of the sun, the temperature drops to about 5,700 K. The turbulent convection of this layer of the sun is also what causes an effect that produces magnetic north and south poles all over the surface of the sun.

Illustration of the structure of the Sun and a red giant star, showing their convective zones. Credit: ESO

It is also on this layer that sunspots occur, which appear as dark patches compared to the surrounding region. These spots correspond to concentrations in the magnetic flux field that inhibit convection and cause regions on the surface to drop in temperature to compared to the surrounding material.
Photosphere:
Lastly, there is the photosphere, the visible surface of the sun. It is here that the sunlight and heat that are radiated and convected to the surface propagate out into space. Temperatures in the layer range between 4,500 and 6,000 K (4,230 - 5,730 °C; 7646 - 10346 °F). Because the upper part of the photosphere is cooler than the lower part, an image of the sun appears brighter in the center than on the edge or limb of the solar disk, in a phenomenon known as limb darkening.

The photosphere is tens to hundreds of kilometers thick, and is also the region of the sun where it becomes opaque to visible light. The reasons for this is because of the decreasing amount of negatively charged Hydrogen ions (H-), which absorb visible light easily. Conversely, the visible light we see is produced as electrons react with hydrogen atoms to produce H- ions.

The Photosphere of the Sun, where visible sunlight and heat are sent into space. Credit: NASA/SDO/AIA

The energy emitted from the photosphere then propagates through space and reaches Earth's atmosphere and the other planets of the solar system. Here on Earth, the upper layer of the atmosphere (the ozone layer) filters much of the sun's ultra-violet (UV) radiation, but passes some onto the surface. The energy that received is then absorbed by the Earth's air and crust, heating our planet and providing organisms with a source of energy.

The sun is at the center of biological and chemical processes here on Earth. Without it, the life cycle of plants and animals would end, the circadian rhythms of all terrestrial creatures would be disrupted; and in time, all life on Earth would cease to exist. The sun's importance has been recognized since prehistoric times, with many cultures viewing it as a deity (more often than not, as the chief deity in their pantheons).

But it is only in the past few centuries that the processes that power the sun have come to be understood. Thanks to ongoing research by physicists, astronomers and biologists, we are now able to grasp how the sun goes about producing energy, and how it passes that on to our solar system. The study of the known universe, with its diversity of star systems and exoplanets - has also helped us to draw comparisons with other types of stars.

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There is a reason life that Earth is the only place in the solar system where life is known to be able to live and thrive. Granted, scientists believe that there may be microbial or even aquatic life forms living beneath the icy surfaces of Europa and Enceladus, or in the methane lakes on Titan.